Fix bug where final queue member would not be removed from memory.

If a static queue had realtime members, then there could be a potential
for those realtime members not to be properly deleted from memory.

If the queue's members were loaded from realtime and then all the
members were deleted from the backend, then the queue would still
think these members existed. The reason was that there was a short-
circuit in code such that if there were no members found in the
backend, then the queue would not be updated to reflect this.

Note that this only affected static queues with realtime members.
Realtime queues with realtime members were unaffected by this issue.

(closes issue ASTERISK-19793)
reported by Marcus Haas
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Merged revisions 371306 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 371313 from http://svn.asterisk.org/svn/asterisk/branches/10
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Merged revisions 371324 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@371325 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 12 insertions, 1 deletions

diff --git a/apps/app_queue.c b/apps/app_queue.c
index 38401607b..6265308b7 100644
--- a/apps/app_queue.c
+++ b/apps/app_queue.c
@@ -2687,8 +2687,19 @@ static void update_realtime_members(struct call_queue *q)
 	struct ao2_iterator mem_iter;
 
 	if (!(member_config = ast_load_realtime_multientry("queue_members", "interface LIKE", "%", "queue_name", q->name , SENTINEL))) {
-		/*This queue doesn't have realtime members*/
+		/* This queue doesn't have realtime members. If the queue still has any realtime
+		 * members in memory, they need to be removed.
+		 */
+		ao2_lock(q);
+		mem_iter = ao2_iterator_init(q->members, 0);
+		while ((m = ao2_iterator_next(&mem_iter))) {
+			if (m->realtime) {
+				ao2_unlink(q->members, m);
+			}
+			ao2_ref(m, -1);
+		}
 		ast_debug(3, "Queue %s has no realtime members defined. No need for update\n", q->name);
+		ao2_unlock(q);
 		return;
 	}